Heylo talib - no, i don't sell eclipse hardware...but every deck i've owned has been an Eclipse deck //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif Cd1001 (circa 1992! touch screen and DSP old school style hehe) to cd8051 to cd8454 to cd7000 - My current deck is the CD7000 with only 5v pre-outs according to eclipse. When i installed it, i didn't adjust my amplifier gains and didn't see any loss in volume when compared to my 8v pre-out CD8051, or my 8v preout CD8454. Also, the CD7000 sounds to my ear as good as either of my previous 8v pre-out decks, which is to say it sounds great and doesn't clip even at high volumes.
Because of my experiences, i tend towards the school of thought that the 8v pre-outs are more important from a marketting standpoint than from a performance standpoint. To add weight to this theory, there are many fairly high end decks out there that sound as good and better than the Eclipse decks i've heard, and THEY use 4v, 5v pre-outs (Clarion DRZ 9255 for example..4v). I don't have the equipment to test voltage output at the pre-outs and haven't felt like doing so to compare the two decks...but taking into consideration that my gains didn't even have to be adjusted, i tend to think that under normal conditions, the 8v preouts will likely not be putting out any higher voltage than the 5v ones. Most amplifiers reach their maximum power @ 2v to 4v anyway....heck, my eclipse EA3422 could reach it's full power with only .2v and it was a nice and clean amp (my 4150 XXK has a higher noise floor by far). From my reading of other peoples' tests, just about all decks regardless as to preout voltage generate under 1volt at reasonable volumes when playing normal music.
You don't need an amazing speaker system to hear the benefits of time alignment. It makes a huge difference, even with stock crappy speakers. How do i know? I tried it with my camry's stock shitbox speakers before i installed my germaniums //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif It makes a big difference in any situation where your speakers are considerably farther from your ears than eachother.